Piano



Dec. 26, `1922. 1,439,935

R. WILLIAMS. PIANO. Flyin Nov. 4. 1918y fkk Inventor.

wwf WJ vf/MAM# Patented Dec. 26, 1922.

UNITED STATES ROBERT WILLIAMS, OF OSHAWA, ONTARIO, CANADA.

PIANO.

Application filed November 4, 1918.

To ZZ flo/1,0m ffii 72mg/ compr/nr l7 Rcmnn'r VILLTAM'S, a subject of the King of Great Britain, and resident of Oshawa7 in the county and Province of Ontario` in the Dominion of Canada,7 have invented certain new and useful Improve ments in Pianos, as described in the following specification and illustrated in the accompanying drawings, that forni part of 10 the same.

The principal objects of the invention are, to effect a material reduction in the cost of 'producing cheaper grades of pianos.

The principal feature of the invention consists in the novel construction of a sounding board, whereby a single width of board is arranged to extend diagonally of the piano fra-nie to support the string bridges.

l'n the drawings `Figure l. is an elevational view of a back of a piano, illustrating the application of my invention.

Figure 2 is a vertical cross sectional view.

lu the manufacture of pianos it has been the practice to construct the sounding board of a number of strips of board joined together and reinforced by battens extending across the strips.

Serial No. 260,971.

It has been found by careful experiment that remarkably good results can be obtained in producing resonance through the vibrations of the strings by the mounting of the string bridges A upon a sounding board B. The peculiar' feature of the sounding board is that it consists of a single narrow width of board which is secured in the piano structure to extend diagonally of the frame in such a manner as to carry the bridges over which the strings are stretched.

The strings C are secured in the ordinary 40 manner by the pins D to the string plate E.

Careful experiments have been made with this structure and it is found to be quite successful in producing a sounding board for the cheaper grades of pianos and produces thoroughly satisfactory results.

What I claim as my invention is A. piano having a sounding board composed of a single narrow board only eXtening diagonally across the frame and rigidly secured therein, and a string bridge supported by said sounding board.

ROBERT WILLIAMS, 

